Snap-through actuation of thick-wall electroactive balloons

Rudykh, Stephan; Bhattacharya, Kaushik; deBotton, Gal

doi:10.1016/j.ijnonlinmec.2011.05.006

Cited by 136 publications

(83 citation statements)

References 12 publications

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“…20 Several theoretical papers have studied voltage-induced deformation in anisotropic membranes. [21][22][23][24][25] We perform experiments under three conditions. In experiments under equal biaxial conditions, voltage-induced linear strains up to 155% are observed, and the change of the type of failure is captured.…”

Section: Introductionmentioning

confidence: 99%

Dielectric elastomer actuators under equal-biaxial forces, uniaxial forces, and uniaxial constraint of stiff fibers

et al. 2012

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Section: Introductionmentioning

confidence: 99%

Dielectric elastomer actuators under equal-biaxial forces, uniaxial forces, and uniaxial constraint of stiff fibers

et al. 2012

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“…(2a). This phenomenon is known as the snap-through effect and is widely discussed in several works Rudykh et al 2012;. To explain this behavior, note that the electrical stress intensifies as a result of two factors -the increase in the voltage and the reduction in the wall thickness of the tube.…”

Section: Noy Cohenmentioning

confidence: 98%

“…These elastomers possess many promising properties such as low density, flexibility, ability to undergo large deformations, fast response and availability. Therefore, EAPs are employed in many actuation-based applications such as artificial muscles (Bar-Cohen, 2001), energy-harvesting M A N U S C R I P T Noy Cohen 2 devices (Springhetti et al, 2014;McKay et al, 2010), micropumps (Rudykh et al, 2012) and tunable wave guides (Shmuel and deBotton, 2013), among others. The actuation is the result of the attraction between two oppositely charged electrodes that are attached to a thin dielectric film.…”

Section: Introductionmentioning

confidence: 99%

Stacked dielectric tubes with electromechanically controlled radii

Cohen

2017

International Journal of Solids and Structures

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This work examines the features and capabilities of a tube comprised of stacked cylindrical dielectric layers separated by flexible electrodes with the applicative aim of electrically controlling the inner radius. The study begins with the analysis of the non-homogenous electromechanical response of a single-layer dielectric tube according to well-established coupled models. Two boundary conditions are examined -traction free boundaries and a fixed outer radius. The advantages and limitations of each boundary conditions are discussed. It is shown that dielectric tubes subjected to traction free boundaries experience instabilities, an effect that can be avoided by fixing the outer surface. Next, the electromechanical behavior of a stacked cylindrical actuator comprised of dielectric tubes that are mechanically connected in series and electrically connected in parallel is determined under the two boundary conditions discussed above. It is shown that the stacking of cylindrical layers increases the range of available inner radii at the cost of design limitations. Interestingly, it is found that mounting layers on a stacked cylindrical actuator may lead to instabilities even if the outer radius is fixed.

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“…Small amplitude radial oscillations of an incompressible, isotropic elastic spherical shell has been a subject of Beatty (2011) study. Rudykh et al (2012) have researched about snap-through actuation of thick-walled electroactive balloons. Inflation and bifurcation of thick-walled compressible elastic spherical-shells has been studied by Haughton (1987).…”

Section: Introductionmentioning

confidence: 99%

On the stability of internally pressurized thick-walled spherical and cylindrical shells made of functionally graded incompressible hyperelastic material

Anani

Rahimi

2018

Lat. Am. j. solids struct.

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In this paper, stability analysis of thick-walled spherical and cylindrical shells made of functionally graded incompressible hyperelastic material subjected to internal pressure is presented. Instability point happens in the inflation of above mentioned shells and in this paper effect of material inhomogeneity and shell thickness has been investigated. Extended Ogden strain energy function with variable material parameter is used to model the material behavior. To model inhomogeneity, we assume that material parameter varies by a power law function in the radial direction and inhomogeneity factor is a power in the power law function. Analytical method is used to find the internal pressure versus hoop extension ratio relations in explicit form for both of cylindrical and spherical shells and the non-monotonic behavior of the inflation curves is studied. Following this, profile of inflation pressure versus hoop stretch is presented and effect of the inhomogeneity and shell thickness in the onset of instability is studied. The obtained results show that the material inhomogeneity parameter and shell thickness have a significant influence on the stability of above mentioned shells. Thus with selecting a proper material inhomogeneity parameter and shell thickness, engineers can design a specific FGM hollow cylinder that can meet some special requirements.

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Snap-through actuation of thick-wall electroactive balloons

Cited by 136 publications

References 12 publications

Dielectric elastomer actuators under equal-biaxial forces, uniaxial forces, and uniaxial constraint of stiff fibers

Dielectric elastomer actuators under equal-biaxial forces, uniaxial forces, and uniaxial constraint of stiff fibers

Stacked dielectric tubes with electromechanically controlled radii

On the stability of internally pressurized thick-walled spherical and cylindrical shells made of functionally graded incompressible hyperelastic material

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